Sorbents with a Taurine Function: Kinetics of Interaction with Singly and Doubly Charged Metal Ions in Ammonium Acetate Buffer Solution

Abstract

The sorption kinetics of selected metal ions from multicomponent solutions by sorbents with taurine functions based on aminopolymers, namely, on chitosan, polyallylamine, and polyethyleneimine, has been studied. Sulfoethylated polyallylamine sorbents are distinguished by the highest silver(I) sorption selectivity and the shortest equilibration time. Sulfoethylated polyethyleneimines, unlike the other sorbents studied, can be used, depending on the pH of ammonium acetate buffer solution, for the group recovery of transition-metal ions or for co-recovering silver(I), copper(II), and nickel(II). The chemical structure of the polymer matrix and the degree of its modification do not significantly affect the initial silver(I) sorption rate from multicomponent solutions.